Furnace



Nov; 8,1927 1,647,987

F. S. EGLOFF FURNACE Filed July 14, 1926 INVENTOR Patented Nov. 8, 192?.

FRANK E. EGLOEF, OE RIVERSIDE, ILLINOI$.

FURNACE.

Application filed July 14,

ward to the upper portion of the furnace casing whence it may pass off through the ducts leading to the various parts of the house. Another ob ect is to provide means forpreventing excessive heating ofthe crown sheet by inducing a current of air from the lower portion of the casing and causing it to pass up along the sides of the firebox and over the hot spot in the crown sheetthereby keeping the latter much cooler than itwould' otherwise be. Another object is to equalize the temperatures of the air in the ditlerent parts of the casing. Still another object is to provide a furnace of simple construction which may be readily repaired.

I obtain these objects by the construction illustrated in the accompanying drawings, in which Figure 1 is an assembly view showing the furnace in longitudinal vertical section.

Figure 2 is a horizontal section taken beneath the roof or dome of the casing.

Figure 3 is a cross sectional elevation on the line 33 Figure 1.

Figure 4c is a front elevation of the furnace.

Like numerals denote like parts throughout the several views.

In the form selected to illustrate the in vention the furnace has an outer casing approximately rectangular in outline. The dome sheet 12 is preferably arched although this is not essential, and cold air is admitted through suitable openings 13. Leading from the upper portion of the casing, preferably from the dome sheet 12 are hot air ducts 14 which. convey the heated air from the easing to various parts of the building. The firebox 16 is enclosed within. and spaced from the bottom and sides of the casing, and at the top has a crown sheet 18, which in the present case is about mid-height of the casing.

Located within the firebox is a burner 20 designed primarily for liquid fuel although the other types of fuel may be employed. The burner is nrdinarily lees-ted.

1926. SerialNo. l22,t72.

near the center of the crown sheet 18 and at asuitable distance beneatlrit. I

A riser 22 is arranged vertically above-the firebox preferably at a point. above the burner. The riser is open top and bottom, the lower end being provided witha collector hood or collar 2 1-, whose mouth is spaced slightly above the crown sheet. The riser is located centrally betweenthe sidesofthe casing and discharges in the upper portion of the casing.

Leading from the rear end of the -firebox is a return flue 26 which extends approxin'iately horizontally forward to the-front of the casing at a slight distance above the crown sheet of the firebox The riser -$22 passes up through it andhence receives heat from the passing flue gases. At the forward end, flue 2G enters a header :28 which extends crosswise of the furnace and del versinto a pair of return flues 30 wh ch lead horizon tally backward toward the rear end of the furnace where they connect with :a rear header 32. From this rear header'the flue gases pass out through a duct 34 of any appropriate form. The flues 30 are spaced apart sufiiciently to accommodate the riser 22 as will be evident from an inspection of the drawing.

In operation, when the burner is lighted the greatest amount of heat will naturally be immediately above the burner and hence the hottest spot in the crown sheet 18 will be in that area directly above the burner. The riser 22 induces a draft and as a result the relatively cool air will be drawn up along the sides ofthe firebox and be caused to pass over the hot spot in the crown sheet,

thus keeping its temperature down to within proper limits. Another result will be that the resulting heated air will be conveyed immediately and directly to the upper portion of the casing where it will be available for delivery out through the ducts 14. Still another result will be that the temperature of the air within the casing will be equalized and circulation will be promoted. This, of course improves the efliciency of the device as a heat transferring apparatus. Another advantageous feature of my furnace is that the fine gases are provided with a long path within the furnace casing and hence abundant opportunity is afforded for the heat to be transferred from the outer surfaces of the fines to the air.

i fiitig thus described my iii.

what- I claim as new and desire to secure by Letters Patent is:

1. A furnace having a casing, a firebox therein having a crown sheet, a burner in the firebox having a localized flame directed toward a definite area of the crown sheet of the firebox, a tlue extending approximately horizontally above and adjacent to the firebox, and a duct rising from a point slightly above the said area of the crown sheet to the upper portion of the casing whereby air is caused to flow directly over a said area of the crown sheet for cooling the same.

2. A hot air furnace having a casing with hot air ducts leading from the upper portion thereof, a firebox in the casing, having a crown sheet, a burner in the firebox having a localized flame directed toward a definite area of the crown sheet, a return flue extending forwardly from the rear of the firebox and above the same, and a pipe arranged vertically within the casing above the firebox and open at both ends, the lower end being bell-shaped and located slightly above the said area of the crown sheet whereby aireis drawn directly over said area of the crown sheet for cooling the same and then conveyed past the flue to the upper portion of the casin 3. A hotair furnace having a casing With hot air ducts leading from the upper portion,

a firebox enclosed within the casing and located in the lower portion thereof, a burner within the firebox, the firebox baring a crown sheet above the burner, a riser consisting of a vertical pipe open at top anl bottom, the lower end being spaced slightly from the crown sheet and discharging near the upper portion of the casing, and a flue leading from the rear end of the firebox forward and upward over the crown sheet, the riser passing up through said fine.

4. A hot air furnace having a casing with hotair ducts leading from the upper portion, the firebox located in the lower portion of the casing and having a crown sheet at the top, a burner in the firebox beneath the crown sheet, a riser consisting of a pipe whose lower end is slightly abore the crown sheet and whose upper end is near the top of the casing, a return flue leading from the rear of the firebox approximately horizontally forward toward the front of the casing and through which the riser passes, and a pair of return lines leading from the forward end of the first line to the rear of the casing and thence outward, said pair of flues also passing at opposite sides of the riser.

In witness whereof, I have hereunto subscribed my name.

FRANK S. EGLOFF. 

